• Proceedings of the Korean Geotechical Society Conference
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• 2005.03a
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• pp.777-780
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• 2005

The bench of cut-slope is necessary to stabilizing. But it is possible to be a weak zone in slope. When a small scale failure is occurred in a bench, it influence a large scale failure of slope. So when it is found out any unstable factor, weathering of rock, a direction of joint in a bench, if the bench is reinforced suitably, the holly failure is prevented in cut-slope

• Proceedings of the Korean Geotechical Society Conference
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• 2005.03a
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• pp.739-744
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• 2005

The construction road work are increasing now. And the domestic slope construction are steadily increased and changed the complicated and large-scale. Therefore ground reinforcement for slope stabilization has been increasingly used during the past few decades with a wide variety of techniques including soil nailing, rock bolt, anchor and different types. But in some cases which applied slope reinforcement construction by badness or mistake. So this paper is the study of construction badness for slope reinforcement.

• Proceedings of the Korean Geotechical Society Conference
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• 2004.03b
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• pp.635-642
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• 2004

Failure occurred slope, due to typhoon 'Rusa' and 'Maemi' last two years, was studied to evaluate the slope failure characteristics. There're three types of the slope in this study, ie. soil slope, rock slope, mixed slope. Statistical analysis was used to estimate the relation between slope type and failure mode. Among the failure occurred slope, soil slope & mixed slope are dominant at the ratio of 33%, 44% respectively. We conclude that soil slope & mixed slope have more higher risk than rock slope during heavy rainfall.

• Proceedings of the Korean Geotechical Society Conference
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• 2004.03b
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• pp.614-621
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• 2004

Blasting is a technique for rock excavation: For instance, a rock cutting in a mountain side to prepare a base for a road. The blasting damage affect the rock slope stability. Therefore control blasting must be used. In this study, cutting cases of Sixty-nine rock blasts were investigated. Blasting damage patterns in rock slope and reinforcement methods are studied.

• Proceedings of the Korean Geotechical Society Conference
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• 2004.03b
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• pp.629-634
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• 2004

When it was a localized torrential downpour last year, a natural-slope fell down above a cut-slope. They were caused that stress was opened by cutting slope, ground water level rose quickly and a ground mass strength fell etc. So volume of ground mass increase because of that reasons, finally the disturbed ground was collapse. Therefore I suggest that safety of a natural-slope is a consideration, when a cut-slope is made by cutting ground.

• Proceedings of the Korean Geotechical Society Conference
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• 2006.03a
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• pp.738-743
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• 2006

Falling rocks are classed by the collapse to wide meaning. it is a kinds of earth disaster that has happen every year. Falling rocks are defined as blocks which had fallen from the cliff. It is caused by the relaxation of discontinuous structures like as a joint, a foliation, a bedding, and so on. Usually, the Relaxation of blocks from the rock face is happened by various kinds factors that are acted as a complex. Sometimes, the tree can be a factor of the weakness or relaxation of rock blocks and a cause of the falling rock.

• Journal of the Korea Safety Management & Science
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• v.14 no.2
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• pp.253-263
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• 2012

Although the national technical qualification scheme has a historical background for thirty-five years, it hasn't any study of an obvious cause analysis, effective counterplan and analysis relation to its historical changes. This paper analyses the internal and external factors of technical qualification policy of the Human resources development service of Korea using PEST and SWOT and surveys the influence on its environment and the variation cause of the ratio of successful applicants to the qualification scheme. This paper also suggests systematically the direction for development of the technical qualification scheme using FMEA. Thus, this study assists to construct rapidly a correspondence system to the environment change simultaneously to determine decision making to the marketing policy.

• Journal of the Korean Society of Industry Convergence
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• v.13 no.3
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• pp.183-189
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• 2010

The purpose of this study was to examine the Industrial High Schools Technical Subjects teachers' perceptions and attitudes toward sustainable development(SD). The instrument consisted of totally 12 items. The subjects of this study were 98 Industrial High Schools Technical Subjects teachers. The period of survey is from June 23 to July 15 of 2010. The questionnaire included items asking whether they heard about terms such as sustainability or sustainable development, the source of information on SD, the level of understanding or the urgent task 2 for SD in Korea. Result of survey is following. First, Teacher thought that urgent task for SD is conservation of natural environment. Second, Most of the teacher consider the concept SD as 'pursuing the balance between environmental protection and economic development, and some of the teachers recognized the concept of SD in the paradigm of continuous economic development. Third, half of teachers have not heard terminology of SD .and 80% of them have not conducted ESD. Fourth, a few of teachers replied that obstacle of ESD is shortage of teacher's professionalism.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2001.04a
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• pp.307-310
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• 2001

In this paper, development of TIM Module for constructing PDM will be introduced. Technical information relevant product data influences cost, quality, precision and productivity. One of the very important feature of product data is organizing not by oneself but very closed to many technical information such as document, file, image and analysis sheet. To manage various technical information, several kinds of management system are used in multi level of production system. PDM and TIM systems are being developed for suitable purpose and are in need of Network technology, Information Technology, Database, sharing and distributing information. Developed TIM system is based on Web environment. By using this system, we can manage systematic technical information and reduce cost for constructing PDM system. And also we will put to practical use another technical information management system for mold plant.

• The Journal of Fisheries Business Administration
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• v.41 no.3
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• pp.45-58
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• 2010

This study estimated the technical efficiency of coastal composite fishery in Korea by using the data envelopment analysis (DEA) and the stochastic frontier analysis (SFA) methods, and the results on the respective method were compared. In the DEA method, the constant returns to scale (CRS) and the variable returns to scale (VRS) output-oriented DEA models were separated and technical efficiencies were estimated, respectively. The average estimated value of technical efficiency by the SFA method (0.633) was found to be lower than that by the VRS-DEA method (0.738), while it was higher than that by the CRS-DEA method (0.479). It was found that strong correlation exists between the SFA method and the VRS-DEA method. The method which can utilize both methods in mutually complementing way for the estimation of technical efficiency was also considered.